Improvement in grates for furnaces



UNITED STATES Parliwrv OFFICE. l

ANDREW WINTRBURN, OF ALBANY, NEW YORK.

Specification forming part of Letters Patent N0. 40,532, dated November 3, 1863.

.To all w/tom/ it may concern:

Be it known that I, ANDREW WINTER- BURN, of Albany, in the county of Albany and State of New York, have invented a new and lmproved Fire-Grate for Furnaces, Stoves, 85e.; and [do hereby declare that the following is a full, clear, and exact description of the same, reference beinghad to the accompanying drawings, making a part of this specification, in which- Figure 1 is a plan or top view of my invention; Fig. 2, a transverse section of 'the same, taken in thev line w w, Fig. l; Fig. 3, a detached view of a plug or pin pertaining to the saine; Fig. 4, a side view of one of the projections or journals of the dumping device.

Similar letters of referenceindicate corresponding parts in the several figures.

A'Io enable those skilled in the art toifully understand and construct my invention, I will proceed to describe it.

A represents aframe of cast-iron, and of such a form that will lit properly in the bottom of the fire-box designed to receive it. This frame has a rectangular opening within it of sufficient capacity to receive the fire-grate.

B is a cast-iron rectangular frame, corresponding'in form to the opening in the frame 4A, and having teeth or' projections a at the inner surfaces of its sides b br, said teeth projecting upward a suitable distance above the sides b b, as shown clearly in Fig. 2.

One end of the frame B is provided with a tubular projection, C, which has a square, c on its outer end. This, projection U isiitted in a bearing, d, at one end of the frame A.- The opposite end of the frame B is also provided with a tubular projection, D,'which is formed of two equal longitudinal parts, e e', one of which,4 e, is cast with the frame B, and has a circular end piece, f, cast with it, through the center of which there is a hole, g. The other part, e', is also provided with a circular end picce,f/, cast with it, and of such diameter as to cover the outer end of part e. The end piece f also has a hole, h, made through its center, through which and the end piece f of the part c a screw,z, passes, having a nut, on its outer end. The tubular projection D is fitted in a bearin g, k, in the end of the frame A. The projections C D serve as journals for the frame B to admit ofthe latter being tilted, in 'order to dump the fire, which is done by a crank or lever tted on the square c of the projection C, and to prevent the frame B tilting casually there are lugs l cast on one side of the frame A, and a button, m, is at the opposite side, by turning which, in order to clear the frame B, the -latter may be tilted, as shown in red in Fig. 2. The projections or journals C D, it will be understood, are at the centers of the ends of the frame B.

E represents a shaft, the ends of which are fitted in the tubular projections C D, and allowed to turn freely therein. The end of this shaft that isA fitted in the projection C has a square opening made in it to receivea crank, F, or aplug, G, the latter being shown in Fig. 3, and having a square, n, on its outer end.. The outer'end of 'the projection C, it will be understood, is open, in order to admit of the insertion of the crank or plug.

In insertingthe shaft Ey in the projections G D, the part e 'of the latter is detached from.

the part e, and one end inserted in 1the projection (l, and the other end laid in D, the part e of the latter being then fitted on the part e, 'the nut j of the screw i being turned, so that the head of the nut may bear against the end of the shaft, and prevent the same from having an unnecessary degree of longitudinal play.

On the shaftE there are a series of circular heads, H, of equal diameter, andat'equal distances apart. These heads may be cast with the shaft E,all in one piece, and have such a position as to be in line with the spaces between the teeth a, as shown clearly in Fig. l. This position, however, is not an arbitrary one. The heads H are nearly equal in diameter to the width of the space between the teeth a', as shown in Fig. 2.

In order to rake or sift the ashes from the lire, the shaft E is rotated through the Inedium of the crank F, or a winch placed on the plug G, inserted in the end of said shaft. The heads H, as they rotate, perform the sifting or raking operation. If desired or necessary, the heads H may be of polygonal, elliptical, or other form, in order to shake up the coal. In practice, however, thecircular heads seem to operate well. 4

Having thus described my inventiomwhaff;

I claim as new, and desire to secure by Letters Patent, is-

1l. The manner of fitting the shaft E in the frame B, as shown and describedto Wit, by means of the tubular projections C D, the latter, D, being=forn1ed of two parts, ee, connected by the screw j, all so arranged that the bearings of the shaft E are made to serve as journals for the dumping-frame B.

2. The combination of the shaft; E and heads H with the revolving frame B and teeth or projections a a, constructed. and operating substantially as anni for the p lirposes described.

f ANDREW WINTERBUBN. Witnesses: 1

J. J. GALLUP, H. P. NUGENT. i 

